[Jscheme-user] Compiled Macros

[Timothy H. <tim...@ma...>]

>>
On second thought, Graham's example points out the need for modules!
In Dr. Scheme, one can specify a "language" when importing a module.
The language is a collection of macros.

I'll take a closer look at how the jscheme compiler handles macros
and report back to this list.

It would be nice to have someway of indicating in the program code
that the program should be compiled using some set of macros.
One easy way would be to add an "include" command that would simply
include the macro code in the source before compiling, e.g.

;; macro2a.scm
(include "macro1.scm")
(define-macro (myplus2 a b)
   `(+ ,a ,b))
(.println java.lang.System.out$ (myplus1 1 2))
(.println java.lang.System.out$ (myplus2 1 2))

This is essentially the way the C handles shared type declarations,
by storing them in .h files which are then included whereever they are 
needed.

What do you think??
---Tim---


>> At 07:24 PM 9/4/2002, Graham Spencer wrote:
>>> Hello,
>>>
>>> I think I've found a bug in JScheme version 5.0.0. Given the 
>>> following two files:
>>>
>>> ;; macro1.scm
>>> (define-macro (myplus1 a b)
>>>   `(+ ,a ,b))
>>>
>>> ;; macro2.scm
>>> (load "macro1.scm")
>>> (define-macro (myplus2 a b)
>>>   `(+ ,a ,b))
>>> (.println java.lang.System.out$ (myplus1 1 2))
>>> (.println java.lang.System.out$ (myplus2 1 2))
>>>
>>> If I compile both files to .class files and then run jscheme.REPL:
>>>
>>> Jscheme 5.0 04/05/2002 http://jscheme.sourceforge.net
>>> > (load "macro2.scm")
>>> 3
>>> 3
>>> #t
>>> > (macro2.load)
>>> (+ 1 2)
>>> 3
>>> #null
>>>
>>> The (load "macro2.scm") works as expected, but in (macro2.load), the 
>>> macro defined in macro1.scm is expanded but not evaluated. In 
>>> general, I cannot get macros defined in one compiled .class file to 
>>> work in another file. Am I doing something wrong, or is this really a 
>>> bug?
>>>
>>> (My apologies if I should have posted this bug report somewhere else.)
>>>
>>> Thanks for your help,
>>>
>>> --g
>>>
>>
>>
>>
>> -------------------------------------------------------
>> This sf.net email is sponsored by: OSDN - Tired of that same old
>> cell phone?  Get a new here for FREE!
>> https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390
>> _______________________________________________
>> Jscheme-user mailing list
>> Jsc...@li...
>> https://lists.sourceforge.net/lists/listinfo/jscheme-user
>>
>
>
>
> -------------------------------------------------------
> This sf.net email is sponsored by: OSDN - Tired of that same old
> cell phone?  Get a new here for FREE!
> https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390
> _______________________________________________
> Jscheme-user mailing list
> Jsc...@li...
> https://lists.sourceforge.net/lists/listinfo/jscheme-user
>